This paper presents the result of the research of applying heat aluminium welding for railway welding and pipe earthing welding. Objects are welding junctions between pipe earthing and copper cables. During the use of joints by means of clamping or gas welding, there are some limitations, the biggest drawback is its ability to transmit signals and then strength of the junctions. Thanks to the technological development of heat aluminum welding, the above mentioned disadvantages have been overcome.